Cheap Flights from San Francisco to London from $200

Frequently Asked Questions

• What are the cheapest flights from San Francisco to London (SFO-YXU)?

  Based on Trip.com data, Air Canada offers one-way fares as low as $200 on Cheapest nonstop routes (e.g. SFO to YXU on Sat, Nov 21), while WestJet offers Cheapest nonstop round-trips from $299 departing on Thu, Nov 5 and returning on Thu, Nov 12.

• Which airlines offer flights from San Francisco to London?

  At the moment, several airlines serve connecting flights from San Francisco to London, including: WestJet Selected airlines are based on historical data collected from flight bookings made by users on Trip.com within the last 90 days.

• When is the best time to book flights from San Francisco to London?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Francisco to London is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How can I find the best deals on flights from San Francisco to London?

  To find best deals on flights from San Francisco to London, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Nov 21, with one-way flights priced at just $200.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Air Canada.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for London travel is around July.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from San Francisco (SFO) to London (YXU) the cheapest?

  The cheapest months to fly from San Francisco to London is August, when demand for travel is lower.

• Which upcoming date is cheapest to fly from San Francisco to London on?

  After crunching the numbers on our October flight calendar, it's currently cheapest to fly from San Francisco to London on October 18, 2026 with WestJet, with prices starting at $321.

• Which airports can I fly into London from San Francisco?

  You can arrive at any of the following airports in London: London International Airport (YXU). Flights from San Francisco International Airport to London International Airport (SFO-YXU) are by far the most popular option for this route.

• Is there any time difference between San Francisco and London?

  The time difference between London and San Francisco is 3h.

• How do I change or cancel my ticket from San Francisco to London?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

• What is the average cost of a one-way flight from San Francisco to London?

  Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from San Francisco to London is $287. Fares vary by travel date, airline and availability.

• How do I book flights from San Francisco to London on Trip.com?

  Enter San Francisco and London, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

• Are there budget airlines on the San Francisco to London route?

  WestJetare the most popular budget airlines flying from San Francisco to London. Check baggage, seat and payment fees before comparing the final price.